Category Archives: Space

The Mars Global Surveyor spacecraft, orbiting the red planet since 1996, has developed a mystery communications problem.

"No signal was received on Nov. 3 and 4, but a weak signal was received on Nov. 5, suggesting the spacecraft had switched to a safe mode and was awaiting further instructions from Earth. The signal cut out completely later that day and nothing has been heard since. Engineers think the spacecraft has performed a programmed maneuver in which it turns its solar arrays toward the sun to maintain its power supply. When it does this, it also reorients its entire body in the same direction, thus making communication with Earth less effective."